Couple of MAP sensor questions

[Marteney, Steven J.]

Do the A/C controls or (possibly) wipers have any vacuum bleed?
Thanks!
Steve

-----Original Message-----
From: Bruce [mailto:nacelp at bright.net]
Sent: Monday, July 30, 2001 12:26 PM
To: gmecm at diy-efi.org
Subject: Re: Couple of MAP sensor questions



You want it close to the manifold, and T'ing is fine so long as there is no
vacuum bleed at the other end,  ie brake booster hose / PCV hoses are a
nono.
Short small diameter lines.
On some applications the use an O ring, and mount the sensor to the manifold
(looks to be the best way).
Bruce


----- Original Message -----
From: "Marteney, Steven J." <smarteney at xlvision.com>
To: <gmecm at diy-efi.org>
Sent: Monday, July 30, 2001 12:15 PM
Subject: RE: Couple of MAP sensor questions


> There are 3 vacuum ports (not including the power brake booster port) on
the
> TPI plenum (that I remember).  One is underneath the plenum right behind
the
> throttle body and it is dedicated to the EGR system.  Two more are on the
> passenger side.  One hooks only to the pressure regulator, the other is
the
> one that is T'd.  Some of its lines go into the wireing harness and I
assume
> go to the A/C controls.  The other lines I'm not sure where they go, don't
> remember.  I don't see any other places to put it unless I 'T' it.  And I
> hate to do it on the line that's already T'd twice.
>
> Steve
>
> -----Original Message-----
> From: Barry Tisdale [mailto:btisdale at cybersol.com]
> Sent: Monday, July 30, 2001 11:44 AM
> To: gmecm at diy-efi.org
> Subject: Re: Couple of MAP sensor questions
>
>
> While not being at all familiar w/ your manifold or plenum, the best way
is
> to provide a separate vacuum source for each device, i.e., no 'tees' or
> anything.  Is this do-able on your setup?  Easier to troubleshoot, too.
>
> Barry
>
> At 09:26 AM 7/30/01 -0400, Marteney, Steven J. wrote:
> >Okay, I'm slow and I admit it, but the 165-730 conversion is just about
> >underway.  Would have been this weekend but other projects got in the
way.
> >I have a couple of questions on hooking up the MAP sensor.
> >1) I know Bruce says use the hard vacuum lines but I'm wondering how long
> of
> >a hard line is too long.  I've been stealing a lot of stuff out of a 6000
> >and I got a piece of hard vacuum line with rubber boots on each end.
It's
> >about 3 feet long.  Is that too long?
> >
> >2) Will a 'T' in the line effect the MAP sensor operation?  One vacuum
port
> >on my plenum already has two T's in it (not my doing) and I hesitate
> putting
> >in a 3rd.  The only other one (easily) available is hooked to the
pressure
> >regulator.  I thought about T-ing that one.  Bad idea?
> >
> >Thanks!
> >Steve
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